Articles &
Research
Notes.
Selected publications, conference presentations, and technical notes from our research programme — sharing knowledge to advance gemmological science.
Automated Raman Spectra Processing for Spinel Origin Determination
T. Sripoonjan — International Gemmological Conference 2025
A novel automated pipeline for Raman spectral processing applied to spinel origin classification, combining baseline correction, peak extraction, and machine learning classification to achieve reliable geographic provenance determination.
Explainable ML Framework for Magmatic Sapphire Classification
T. Sripoonjan — GIT Conference 2025
Application of SHAP-based explainability techniques to random forest models for magmatic vs. metamorphic sapphire classification using trace element chemistry.
Tsavorite Garnet Characterisation: Spectroscopic and Gemmological Study
C. Jakkawanvibul, T. Sripoonjan — GIT 2025 Research Exhibition
Comprehensive characterisation of tsavorite garnet from East African deposits, combining Raman, EDXRF, and UV-Vis data for origin discrimination.
Machine-Learning Applications in Ruby Origin Classification
T. Sripoonjan — BGJF 72nd Edition Seminar
Demonstration of supervised machine-learning techniques for classifying ruby geographic origin using EDXRF trace element data and spectroscopic features.
Imperial Jade Authentication: Modern Analytical Approaches
C. Jakkawanvibul — SCB Wealth / Central Pattana Exclusive Event
Educational presentation on modern jade authentication techniques, combining traditional gemmological observations with Raman spectroscopy and FTIR analysis.
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